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reflex-components-core Changelog

v0.10.0 (2026-10-08)

Breaking Changes

  • Require Python 3.11 or newer; Python 3.10 is no longer supported. (#7449)

Features

  • The connection banner reads REFLEX_BACKEND_COLD_START_TIMEOUT as a duration, so it accepts a unit suffix such as 30s. A bare number is still read as seconds. (#7138)

Bug Fixes

  • Fix rx.match raising ReferenceError: Can't find variable at render when a state Var is used only in a case condition with component branches. (#6675)
  • Exclude IDs on forms and other non-controls from form submissions while preserving unset ID-backed controls and supporting custom controls marked with _is_form_control. (#7227)

Miscellaneous

  • Update react-dropzone to 17.0.0 and react-error-boundary to 6.1.6. (#7424)

v0.9.10.post1 (2026-09-21)

Bug Fixes

  • Require reflex-base >= 0.9.12. The declared floor was older than the reflex_base.components.tags.CommonTag import this package relies on, so a resolver was free to pair it with a reflex-base that fails at import time with ImportError: cannot import name 'CommonTag'. (#7268)

v0.9.10 (2026-09-21)

Bug Fixes

  • rx.el.svg and its children now render as one memoized component, so defs such as gradients and the elements that reference them by id always share one render scope. (#6708)
  • rx.debounce_input (which fully-controlled inputs compile to) now delivers a parent-provided ref to the underlying input element instead of the component instance, fixing crashes under rx.form.control(..., as_child=True). (#6850)
  • Return a controlled 400 response when an upload request references an unknown event handler. (#6860)
  • Give the Built with Reflex badge an accessible name when its visual text is hidden on small screens. (#7078)
  • reflex_components_core.datadisplay no longer advertises code_block, data_editor and friends: those moved to the standalone reflex-components-code and reflex-components-dataeditor packages, so accessing them here raised ModuleNotFoundError. Reach them as before via rx.code_block / rx.data_editor, or reflex.components.datadisplay.code. (#7124)
  • Stop the default error boundary fallback from logging invalid DOM property warnings for its SVG icon. (#7130)

Miscellaneous

  • Annotate _render overrides as returning CommonTag, the new base of every tag class. (#7121)

v0.9.9 (2026-08-28)

Features

  • The "Built with Reflex" badge appends a urlencoded ref query parameter to its reflex.dev link when the REFLEX_REFERRER_PARAM environment variable is set at compile time. (#6951)

Bug Fixes

  • Sanitize buffered upload filenames the same way streamed upload filenames are sanitized. (#6753)
  • rx.script head updates now flush synchronously instead of via react-helmet's requestAnimationFrame batching, fixing intermittently missing script tags after hydration (flaky "scripts not loaded" failures). (#6905)
  • Upload filenames whose segments contain nothing but dots and spaces (e.g. "..", "./../.", ".. ") now sanitize to the fallback name upload instead of returning the bare segment. Such names pointed the saved path outside the upload directory — directly on POSIX, and via Win32's trailing dot/space trimming on Windows — and crashed the upload handler with a 500. (#6971)

Miscellaneous

  • Hoist the RegistrationContext import in the upload handler to module level. (#6382)
  • Internal logging migrated from the legacy console helpers to standard python logging per-module loggers. (#6864)
  • Property docstrings are now noun phrases rather than "Get the ..." / "Return the ..." (ruff 0.16's new D421). (#6893)

v0.9.8 (2026-08-04)

Miscellaneous

  • Bumped react-error-boundary 6.1.1 → 6.1.2. (#6678)

v0.9.7 (2026-07-15)

Miscellaneous

  • rx.upload internals use ArrayVar.map instead of the deprecated foreach. (#6701)

v0.9.6 (2026-06-25)

Bug Fixes

  • Deliver extra bound handler arguments to upload handlers, so on_drop=State.handle_upload(rx.upload_files(...), field) passes field through to the backend instead of raising a missing-argument error. (#5290)
  • Preserve literal string types through rx.cond, so rx.cond(State.flag, "green", "red") infers Var[Literal["green", "red"]] instead of widening to Var[str] and tripping Pyright on props typed as Literal[...] | Var[Literal[...]] such as Radix color_scheme. (#6545)
  • rx.debounce_input no longer crashes the page with ReferenceError: input is not defined when wrapping a native DOM element such as rx.el.input or rx.el.textarea. The element prop now passes global-scope tags as string literals (element:"input"), while library components keep referencing their imported identifiers. (#6637)

v0.9.5 (2026-06-10)

Features

  • Form now validates statically-knowable fields against a TypedDict-annotated on_submit handler at create time: it walks nested form controls (including components nested in props), collects their static name/id values, and raises EventHandlerValueError listing the missing and present fields when a required TypedDict field has no matching control. input, select, and textarea are marked as form controls so their identifiers are collected, and required-field resolution honors NotRequired across Python 3.10 and 3.11+. The on_submit handler signature also accepts a mapping-style payload via on_submit_mapping_event. (#6301)

Miscellaneous

  • The connection-error banner now subscribes only to the dedicated CONNECT_ERRORS hook instead of the shared events hook, and the upload component declares its UploadFilesProvider through VarData.app_wraps rather than Upload._get_app_wrap_components. (#6447)